Java中的文件线程(Threading in Java for files)

 我正在阅读Java中的文件内容。 我有大约8000个文件来读取内容并将其放在HashMap中，如（路径，内容）。 我认为使用线程可以做到这一点，以加快这个过程。 从我所知的所有8000个文件在不同线程中读取其内容是不可能的（我们可能想限制线程），对它的任何评论？ 另外，我对Java线程化是新手，有谁可以帮助您开始使用Java吗？ 
 
 到目前为止，我认为这个代码是： 
 
    public class ThreadingTest extends Thread {

public HashMap<String, String > contents = new HashMap<String, String>();


public ThreadingTest(ArrayList<String> paths)
{
    for(String s : paths)
    {
      // paths is paths to files.
      // Have threading here for each path going to get contents from a        
      //  file  
        //Not sure how to limit and start threads here
        readFile(s);
        Thread t = new Thread();
        t.start();
    }
}


public String readFile(String path) throws IOException
{
    FileReader reader = new FileReader(path);
    StringBuilder sb = new StringBuilder();
    BufferedReader br = new BufferedReader(reader);
    String line;
    while ( (line=br.readLine()) != null) {
      sb.append(line);
    }

    return textOnly;

}

 }
 
 任何帮助完成线程过程。 谢谢 

I am looking to read the contents of a file in Java. I have about 8000 files to read the contents and have it in HashMap like (path,contents). I think using Threads would be a option for doing this to speed up the process. From what I know having all 8000 files to read their contents in different threads is not possible(we may want to limit the threads),Any comments on it? Also I am new to threading in Java, can any one help on how to get started on this one?
 
so far I thought this pesudo code, :
 
    public class ThreadingTest extends Thread {

public HashMap<String, String > contents = new HashMap<String, String>();


public ThreadingTest(ArrayList<String> paths)
{
    for(String s : paths)
    {
      // paths is paths to files.
      // Have threading here for each path going to get contents from a        
      //  file  
        //Not sure how to limit and start threads here
        readFile(s);
        Thread t = new Thread();
        t.start();
    }
}


public String readFile(String path) throws IOException
{
    FileReader reader = new FileReader(path);
    StringBuilder sb = new StringBuilder();
    BufferedReader br = new BufferedReader(reader);
    String line;
    while ( (line=br.readLine()) != null) {
      sb.append(line);
    }

    return textOnly;

}

 }
 
Any help in completing the threading process. Thanks 

原文：https://stackoverflow.com/questions/5106197